package Problems;
/*
4、利用 for 循环打印 9*9 表?
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
 */
public class Test4 {
    public static void main(String[] args) {
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <=i; j++) {
                System.out.print(i+ "*" +j+ "=" +(i*j)+ " ");
            }
            System.out.print("\n");
        }
    }
}

/*
使用while循环打印
package day01;

public class dome02 {
    public static void main(String[] args) {
        int j=1;
        while (j<=9) {
            int i=1;
            while (i<=j) {
                System.out.print(i+"*"+j+"="+i*j+"\t");
                i++;
            }
               System.out.print("\n");
               j++;
        }
    }
}

用do  while循环打印九九乘法表
package day01;

public class dome03 {
     public static void main(String[] args) {
        int j=1;
        do {
            int i=1;
            do {
                System.out.print(i+"*"+j+"="+i*j+"\t");
                i++;
            } while (i<=j);
               System.out.print("\n");
               j++;
         } while (j<=9);
    }
}
 */